I notice that the output in the scope appears more or less correct but the curve is jagged and not smooth. I can reduce the step size or tolerances and the output becomes more smooth, but this is at a cost of simulation speed. Is there a better solution?

I have controls running at a fixed-step, but I want to be able to simulate the electrical phenomena of the plant with variable-step since this is faster and more efficient. Is there a solution for a hybrid time step?